Pick-ball cover for looms.



' T.v NEVIN. PIGK BALL COVER FOR LOOMS.

APPLICATION FILED JULY 7, 1908.

Patented Feb. 16, 1909.

ill PATENT FFTOE.

THOMAS NEVIN, OF LOWELL, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

PICK-BALL COVER FOR LOOMS.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed July 7, 1908. Serial No. $22,363.

To all whom it may concern:

Be it known that I, Tnoanxs Nevin, a citizen of the United States, residin at Lowell, county of Middlesex, and State or Massachusetts, have invented an Improvement in Pick-Ball Covers for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like numerals on the drawing representing like parts.

This invention relates to the picking mechanism of a loom, and it has for its 01 ject the production of a novel cover for the pickball, as it is commonly termed, the cover having novel features of construction and being so held in place that it retains the ball in position while at the same time preventing oil from being thrown onto the cloth.

In a common form of picking mechanism the pick-cam cooperates with a conical roll or ball rotatably mounted on an arm of the pick-shaft, and in practice the ball must be well lubricated. To prevent the oil from being thrown onto the cloth the ball has heretofore been provided with a cover attached to the arm, but sometimes the attaching device loosens and the cover swings around into such position that it is caught in other parts of the mechanism and breakage results.

In my present invention I have improved the effectiveness of the cover and I have so mounted it that if it becomes loose it will drop off the pick-ball arm and onto the floor, and when it drops it releases the ball. The latter then falls off its supporting arm and as the shuttle will not be picked the loom will be instantly stopped by the usual protection mechanism, so that the fault can be remedied promptly.

The novel features of my invention, one practical embodiment whereof is herein shown, will be fully described in the :sul joined specification and particularly pointed out in the following claims.

Figure 1 is a front elevation of a sufficient portion of the picking mechanism of a loom, with one embodiment of my invention applied thereto; Fig. 2 is an enlarged longitudinal sectional detail taken through the pick-ball, the supporting arm therefor, and the cover for the ball; Fig. 3 is a right hand end elevation of the device shown in Fig. 2 the end of the cover being broken out.

Referring to Fig. 1 the loom-side 1, ro-

I I l l J' i l I tating cam-shaft 2, the pick-cam 3 fast thereon, the pick-shaft l mounted to rock in hearings on the loom-side and provided with an arm 5 having a bearing portion 6, Fig. 2 for the conical roll or pick-ball 7, and the connection 8 with the pickerstick, said connection being partly shown in Fig. 1, may be and are all substantially of well-known construction and operate in usual manner.

in the present embodiment of my invention the top of the arm 5, adj acent the shoulder 9 of the bearing portion 6, is flattened at 10 to form a seat for an ear or extension 11 forming a part of the cover 12, and an attaching bolt 13 is passed through said extension and the arm, securely holding the cover in place. The hood-like body of the cover extends over the ball 7 and part way down around its sides, as shown, preventing the oil from being thrown from the ball onto the cloth. The outer end of the cover is closed at 14 and has on its inner face a transverse shoulder 15, formed by thickening the lower part of said end 14-, as at 16, and the thickened portion abuts against the outer end of the bearing portion 6, as shown best in Fig. 2. The outer end of said bearing portion is shaped to present a transverse shoulder 17 which overhangs the shoulder 15 when the parts are in assembled position, and at such time the thickened portion 16 extends beyond the end of said bearing portion and across the adjacent end of the ball, retaining the latter in proper position. This is clearly shown in Figs. 2 and 3 and it will be obvious that so long as the cover is in place on the arm 5 it will act, through the retaining device or stop 16, to maintain the ball on the bearing portion 6 of the arm 5, the cooperation of the opposed shoulders 15 and 17 preventing any tendency of the cover to twist and assisting in holding its extension 11 squarely on the seat 10. The nut 18 is applied to the upper end of the attaching bolt, so that if the nut comes Oil the bolt will drop out, freeing the cover. The latter will then fall to the floor and as the ball is then free it will slide off its bearing 6, and the failure of the shuttle to be picked will at once set into operation the usual protection mechanism to effect stoppage of the loom. Having fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In picking mechanism for looms, a pickshaft having an arm provided on its topl portion with a seat, a ball mounted on the arm, a hood-like cover for the ball, having an extension to rest upon the seat, a device extended through said extension and seat to fixedly hold the cover in place, and means on the outer, closed end of the cover to cooperate with the adjacent end of the ball toretain the ball in operative position on the arm While the cover is attached thereto.

2. In picking mechanism for looms, a pickshaft having an arm provided with a ball, a fiat seat on said arm adjacent the inner end of the ball, a cover for the latter, having an extension mounted on the seat of the arm and having downturned sides and a closed outer end, and a retaining device on the closed end of the cover to cooperate with the adjacent end of the ball and retain the latter in operative position on the arm.

3. In picking mechanism for looms, a pickball, an arm on which it is rotatably mounted, a cover for the ball, cooperating with the latter to retain it in operative position, an attaching bolt connecting the cover with the arm, and a nut on the upper end of the bolt, whereby the latter will drop when the nut is disconnected, thereby permitting the cover and ball to drop off the arm.

-l. In picking mechanism for looms, a pickshaft having a seat, a bearing portion and a transverse shoulder on the outer end of the latter, a ball rotatably mounted on said bearing portion, a cover for the ball having an extension, means to attach the extension to the seat, said cover having a closed outer end, and a retaining device on the cover, to cooperate with the adjacent end of and retain the ball on the bearing portion, said device being transversely shouldered to extend under the shoulder on the bearing portion.

5. In picking mechanism for looms, a pickshaft having an arm provided with a bearing portion having an overhanging, transverse shoulder on its outer end, a ball mounted on the bearing portion, and means to retain the ball in operative position on said bearing portion and also form a cover for the ball, said means having a transverse shoulder to cooperate with the shoulder on the bearing portion.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

CHAS. H. CONANT, BESSIE A. BYAM. 

